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MMBZ5221BLT1 Series
Preferred Device
Zener Voltage Regulators
225 mW SOT−23 Surface Mount
This series of Zener diodes is offered in the convenient, surface
mount plastic SOT−23 package. These devices are designed to provide
voltage regulation with minimum space requirement. They are well
suited for applications such as cellular phones, hand held portables,
and high density PC boards.
Features
Pb−Free Packages are Available
225 mW Rating on FR−4 or FR−5 Board
Zener Voltage Range − 2.4 V to 91 V
Package Designed for Optimal Automated Board Assembly
Small Package Size for High Density Applications
ESD Rating of Class 3 (>16 KV) per Human Body Model
Mechanical Characteristics
CASE: Void-free, transfer-molded, thermosetting plastic case
FINISH: Corrosion resistant finish, easily solderable
MAXIMUM CASE TEMPERATURE FOR SOLDERING PURPOSES:
260°C for 10 Seconds
POLARITY: Cathode indicated by polarity band
FLAMMABILITY RATING: UL 94 V−0
MAXIMUM RATINGS
Rating
Symbol
Max
Unit
Total Power Dissipation on FR−5 Board,
(Note 1) @ TA = 25°C
Derated above 25°C
PD
225 mW
1.8 mW/°C
Thermal Resistance,
Junction−to−Ambient
RqJA
556 °C/W
Total Power Dissipation on Alumina
Substrate, (Note 2) @ TA = 25°C
Derated above 25°C
PD
300 mW
2.4 mW/°C
Thermal Resistance,
Junction−to−Ambient
RqJA
417 °C/W
Junction and Storage
Temperature Range
TJ, Tstg −65 to +150 °C
Maximum ratings are those values beyond which device damage can occur.
Maximum ratings applied to the device are individual stress limit values (not
normal operating conditions) and are not valid simultaneously. If these limits
are exceeded, device functional operation is not implied, damage may occur
and reliability may be affected.
1. FR−5 = 1.0 X 0.75 X 0.62 in.
2. Alumina = 0.4 X 0.3 X 0.024 in, 99.5% alumina.
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Cathode
1
Anode
1
2
MARKING
DIAGRAM
3 SOT−23
CASE 318
STYLE 8
xxx
xxx = Specific Device Code
M = Date Code
ORDERING INFORMATION
Device**
Package
Shipping
MMBZ52xxBLT1 SOT−23 3000/Tape & Reel
MMBZ52xxBLT1G SOT−23 3000/Tape & Reel
(Pb−Free)
MMBZ52xxBLT3 SOT−23 10,000/Tape & Reel
MMBZ52xxBLT3G SOT−23 10,000/Tape & Reel
(Pb−Free)
**The “T1” suffix refers to an 8 mm, 7 inch reel.
The “T3” suffix refers to an 8 mm, 13 inch reel.
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
DEVICE MARKING INFORMATION
See specific marking information in the device marking
column of the Electrical Characteristics table on page 3 of
this data sheet.
Devices listed in bold, italic are ON Semiconductor
Preferred devices. Preferred devices are recommended
choices for future use and best overall value.
© Semiconductor Components Industries, LLC, 2004
August, 2004 − Rev. 5
1
Publication Order Number:
MMBZ5221BLT1/D

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MMBZ5221BLT1 Series
ELECTRICAL CHARACTERISTICS
(Pinout: 1-Anode, 2-No Connection, 3-Cathode) (TA = 25°C
unless otherwise noted, VF = 0.95 V Max. @ IF = 10 mA)
Symbol
Parameter
VZ Reverse Zener Voltage @ IZT
IZT Reverse Current
ZZT Maximum Zener Impedance @ IZT
IZK Reverse Current
ZZK Maximum Zener Impedance @ IZK
IR Reverse Leakage Current @ VR
VR Reverse Voltage
IF Forward Current
VF Forward Voltage @ IF
I
IF
VZ VR
IIRZT VF
V
Zener Voltage Regulator
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MMBZ5221BLT1 Series
ELECTRICAL CHARACTERISTICS (Pinout: 1-Anode, 2-NC, 3-Cathode) (VF = 0.9 V Max @ IF = 10 mA for all types.)
Zener Voltage (Note 3)
Zener Impedance
Leakage Current
Device
Device
Marking
VZ (Volts)
Min Nom Max
@ IZT
mA
ZZT @ IZT
W
ZZK @ IZK
W mA
IR @ VR
mA Volts
MMBZ5221BL
MMBZ5222BL
MMBZ5223BL
MMBZ5224BL
MMBZ5225BL
18A 2.28 2.4 2.52 20
18B 2.37 2.5 2.63 20
18C 2.56 2.7 2.84 20
18D 2.66 2.8 2.94 20
18E 2.85 3 3.15 20
30
1200
0.25
100
1
30
1250
0.25
100
1
30
1300
0.25
75
1
30
1400
0.25
75
1
29
1600
0.25
50
1
MMBZ5226BL
MMBZ5227BL
MMBZ5228BL
MMBZ5229BL
MMBZ5230BL
8A 3.13 3.3 3.47 20
8B 3.42 3.6 3.78 20
8C 3.70 3.9 4.10 20
8D 4.08 4.3 4.52 20
8E 4.46 4.7 4.94 20
28
1600
0.25
25
1
24
1700
0.25
15
1
23
1900
0.25
10
1
22
2000
0.25
5
1
19
1900
0.25
5
2
MMBZ5231BL
MMBZ5232BL
MMBZ5233BL
MMBZ5234BL
MMBZ5235BL
8F 4.84 5.1 5.36 20
8G 5.32 5.6 5.88 20
8H 5.70 6 6.30 20
8J 5.89 6.2 6.51 20
8K 6.46 6.8 7.14 20
17
1600
0.25
5
2
11
1600
0.25
5
3
7
1600
0.25
5
3.5
7
1000
0.25
5
4
5
750 0.25
3
5
MMBZ5236BL
MMBZ5237BL
MMBZ5238BL
MMBZ5239BL
MMBZ5240BL
8L 7.12 7.5 7.88 20
8M 7.79 8.2 8.61 20
8N 8.26 8.7 9.14 20
8P 8.64 9.1 9.56 20
8Q 9.50 10 10.50 20
6
500 0.25
3
6
8
500 0.25
3
6.5
8
600 0.25
3
6.5
10
600 0.25
3
7
17
600 0.25
3
8
MMBZ5241BL
MMBZ5242BL
MMBZ5243BL
MMBZ5244BL
MMBZ5245BL
8R 10.4 11 11.55 20
22
600 0.25
2
8.4
8S 11.40 12 12.60 20
30
600 0.25
1
9.1
8T 12.35 13 13.65 9.5
13
600 0.25 0.5
9.9
8U
13.30 14 14.70
9
15
600 0.25 0.1
10
8V 14.25 15 15.75 8.5
16
600 0.25 0.1
11
MMBZ5246BL
MMBZ5247BL
MMBZ5248BL
MMBZ5249BL
MMBZ5250BL
8W 15.20 16 16.80 7.8
17
600 0.25 0.1
12
8X 16.15 17 17.85 7.4
19
600 0.25 0.1
13
8Y
17.10 18 18.90
7
21
600 0.25 0.1
14
8Z 18.05 19 19.95 6.6
23
600 0.25 0.1
14
81A 19.00 20 21.00 6.2
25
600 0.25 0.1
15
MMBZ5251BL
MMBZ5252BL
MMBZ5253BL
MMBZ5254BL
MMBZ5255BL
81B 20.90 22 23.10 5.6
29
600 0.25 0.1
17
81C 22.80 24 25.20 5.2
33
600 0.25 0.1
18
81D 23.75 25 26.25 5
35
600 0.25 0.1
19
81E 25.65 27 28.35 4.6
41
600 0.25 0.1
21
81F 26.60 28 29.40 4.5
44
600 0.25 0.1
21
MMBZ5256BL
MMBZ5257BL
MMBZ5258BL
MMBZ5259BL
MMBZ5260BL
81G 28.50 30 31.50 4.2
49
600 0.25 0.1
23
81H 31.35 33 34.65 3.8
58
700 0.25 0.1
25
81J 34.20 36 37.80 3.4
70
700 0.25 0.1
27
81K 37.05 39 40.95 3.2
80
800 0.25 0.1
30
81L 40.85 43 45.15 3
93
900 0.25 0.1
33
MMBZ5261BL
MMBZ5262BL
MMBZ5263BL
MMBZ5264BL
MMBZ5265BL
81M 44.65 47 49.35 2.7
81N 48.45 51 53.55 2.5
81P 53.20 56 58.80 2.2
81Q 57.00 60 63.00 2.1
81R 58.90 62 65.10 2
105
1000
0.25
0.1
36
125
1100
0.25
0.1
39
150
1300
0.25
0.1
43
170
1400
0.25
0.1
46
185
1400
0.25
0.1
47
MMBZ5266BL
MMBZ5267BL
MMBZ5268BL
MMBZ5269BL
MMBZ5270BL
81S 64.60 68 71.40 1.8
81T 71.25 75 78.75 1.7
81U 77.90 82 86.10 1.5
81V 82.65 87 91.35 1.4
81W
86.45
91
95.55
1.4
230
1600
0.25
0.1
270
1700
0.25
0.1
330
2000
0.25
0.1
370
2200
0.25
0.1
400
2300
0.25
0.1
3. Zener voltage is measured with a pulse test current IZ at an ambient temperature of 25°C
NOTE: MMBZ5233BLT1, MMBZ5246BLT1, MMBZ5251BLT1, and MMBZ5252BLT1 Not Available in 10,000/Tape & Reel.
52
56
62
68
69
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MMBZ5221BLT1 Series
TYPICAL CHARACTERISTICS
8
7 TYPICAL TC VALUES
6 FOR MMBZ5221BLT1 SERIES
5
4
3
VZ @ IZT
2
1
0
−1
−2
−3 2 3 4 5 6 7 8 9 10 11
VZ, NOMINAL ZENER VOLTAGE (V)
Figure 1. Temperature Coefficients
(Temperature Range − 55°C to +150°C)
12
100
TYPICAL TC VALUES
FOR MMBZ5221BLT1 SERIES
10
VZ @ IZT
1 10 100
VZ, NOMINAL ZENER VOLTAGE (V)
Figure 2. Temperature Coefficients
(Temperature Range − 55°C to +150°C)
1000
IZ = 1 mA
100
5 mA
20 mA
10
TJ = 25°C
IZ(AC) = 0.1 IZ(DC)
f = 1 kHz
1000
75 V (MMBZ5267BLT1)
91 V (MMBZ5270BLT1)
100
10
150°C 75°C 25°C 0°C
11
1 10 100 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
VZ, NOMINAL ZENER VOLTAGE
VF, FORWARD VOLTAGE (V)
Figure 3. Effect of Zener Voltage on
Zener Impedance
Figure 4. Typical Forward Voltage
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MMBZ5221BLT1 Series
TYPICAL CHARACTERISTICS
1000
0 V BIAS
1 V BIAS
100
TA = 25°C
1000
100
10
1
BIAS AT
50% OF VZ NOM
10
0.1
0.01
0.001
0.0001
1 0.00001
1 10 100 0
VZ, NOMINAL ZENER VOLTAGE (V)
Figure 5. Typical Capacitance
+150°C
+ 25°C
− 55°C
10 20 30 40 50 60 70 80
VZ, NOMINAL ZENER VOLTAGE (V)
Figure 6. Typical Leakage Current
90
100 100
TA = 25°C
TA = 25°C
10 10
11
0.1 0.1
0.01 0
24
6 8 10
VZ, ZENER VOLTAGE (V)
12
Figure 7. Zener Voltage versus Zener Current
(VZ Up to 12 V)
0.01 10
30 50 70
VZ, ZENER VOLTAGE (V)
90
Figure 8. Zener Voltage versus Zener Current
(12 V to 91 V)
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